@Dan
Re 41a.

Extreme weather is in itself not caused by global warming, but the frequency of its occurrence and its severity is related to the global temperature.

For example, hurricanes can't form unless the sea over which they start has a surface temperature of at least 28°C (I think that's the correct figure). Global warming means that a given area of ocean will, on average, be at or above that temperature for a longer part of the year, so resulting in (again on average) more hurricanes per year.

Similarly, because there is more energy available to them, they are likely to be stronger.

Individual weather events of course display a wide variation in severity, and will continue to do so regardless of global temperature.
( K2k6 has a proper job these days, Thu 8 May 2008, 12:11, Reply)